It’s not easy to dye cotton fabric a washfast and lightfast blue with natural dyes (except with indigo and woad).
After reading that iron in the soil makes hydrangea flowers more blue, I wondered if iron mordant could help to fix the blue color to cotton fabric. And after some experiments with different mordants and modifiers and various natural blue dye materials, I’ve finally found out that red cabbage dye + iron mordant produces a beautiful washfast and lightfast blue! Yay!
So in this tutorial I’ll show how to dye cotton and viscose rayon fabric blue with red cabbage and DIY iron mordant. Continue reading How To Dye Cotton Blue With Red Cabbage (DIY Iron Mordant, Cold Method)